djerfisherite
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Djerfisherite is an alkali copper–iron sulfide mineral and a member of the djerfisherite group.
Wikidata facts
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- Djerfisherite.jpg
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- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 2.FC.05
- crystal system
- cubic crystal system
- Nickel-Strunz 9th edition (updated 2009)
- 2.FC.05
- Commons category
- Djerfisherite
- IMA Mineral Symbol
- Djr
- chemical formula
- K₆(Fe,Cu,Ni)₂₅S₂₆Cl
- Strunz 8th edition (series ID, updated)
- II/A.07
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Encyclopedic overview
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- References
Djerfisherite is an alkali copper–iron sulfide mineral and a member of the djerfisherite group.
The chemical composition is somewhat variable. A Russian study from 1979 on djerfisherite from the Kola Peninsula found the formula , but a study in 2007 of samples from Siberia found no detectable sodium and states that the formula is considered the most appropriate. Both crystallographic studies have 58 atoms per unit cell. Sulfur atoms are in three nonequivalent locations, containing 12, 6, and 8 atoms per unit cell. The later study put a copper atom where the earlier study put a sodium atom. More information on the structure and other questions is available, as well as 3-D models.
Excerpted from Wikipedia’s “djerfisherite” article, available under the CC BY-SA 4.0 licence.